JP makes some of the best AR barrels. There are a few reasons why many barrels don't compete. Firstly, JP starts with a very high quality barrel blank. The barrel is cryogenically treated which helps to minimize thermal drift. Thermal drift is one of the main issues you will run into when shooting at long ranges. Each bolt is specifically head spaced to each barrel for flawless function and great reliability. JP is known for accuracy. For this exact reason many competitors around the US use their rifles.